Furnace construction



Dec. 30, 1941. l.. H. HOSBEIN 2,267,864

FURN ,'"flE CONS TRUC'TION Filed April 22, 1939 ATTORNEY.

Patented Dec. 30, 194i y FURNACE CONSTRUCTION Louis H. Hosbein, Glencoe,Ill., assignor to M. H. Detrick Company, Chicago, Ill., a corporation ofDelaware Application April 22, 1939, Serial No. 269,400

1 Claim.

This invention relates in general to furnace wall construction, and moreparticularly to thin dividing walls of refractory material for usebetween separate-and adjacent furnace'units, such as oil crackingstills.

A principal object of the invention is the provision of such a thindividing wall which includes vertically disposed, metallic tubesextending therethrough and spaced from each other as far apart as isconsistent with maintaining the necessary stability of the wall.

Another important object vof the invention is the provision ofinsulation around the tubes employed in such a wall to materiallydecrease the transfer of heat from the` furnace to the tubes and toeliminate the. usual black spots which would otherwise form in therefractory portions of the wall adjacent the tubes.

A further important object of the invention is the provision of such awall which is completely leak proof, both transversely andlongitudinally thereof.

Another object of the invention is the provision of -such a wall for usebetween top-fired or downdraft furnace units, so that additional air forcombustion purposes will be automatically supplied at the top thereofthrough said tubes.

Numerous other objects and advantages ofthe invention will be apparentas it is ,better understood from the following description, which, whentaken in connection with the accompanyingA (Cl. 11G-e1) rest upon andare supported by a pair of I-be I5 extending transversely across thefurnace units parallel with the I-beams I2.

Adjacent its upper end, which extends between the I-beams I2,.each ofthe tubes I3 is provided with a pair of upper and lowerring members I6and Il surrounding the tube and having diametrically opposed flangeportions extending outwardly therefrom. 'ihe main portion of each of therings I6, I1 has a suiciently small diameter to permit sliding of therings upon the tube between the I-beams I2. The flange portions of therings I6, Il are of such length as to drawing, discloses a preferredembodiment thereof.

Inthe drawing,

Figure `1 is an elevational view, with parts broken away and partly insection, of a furnace wall embodying the features of the instantinvention;

Fig. 2 is a transverse,` vertical section takenl substantially fon theline 2 2 of Fig. 1; and

Fig. 3 is a horizontal sectional view taken sub-k stantially on the line3-3 of Fig.v 2.

The wall shown in the drawing, and indicated generally by referencenumeral Il, is a thin dividing wall interposed between adjacent furnaceunits, 'such as in a battery of oil cracking stills, in which theseparate units are top-fired -from a point above the I-beams I2which-exengage above and below, respectively, the lower inner flanges ofthe I-beams I2. Consequently,

the rings I6, I'I are placed over the upper end of the tube I3, sliddownwardly between the I-beams I2, and rotated through 90 to theirposition of Figs. l and 2. Bolts I8 extend through suitable apertures atoppositesides of the rings I6, I1 to clamp the same upon the lowerflanges of the I-beams I2. vIn this position, the rings I6, Il functionas a temporary retaining guide means for holding the tube I3'in verticalalinement with the other tubes employed. Each of the tubes I3 isprovided with an outer covering I9 of paper, and the tubes are made ofan alloy that will effectively withstand temperatures up to 1800.

After the several tubes I3 have been mounted in desired position,wherein they are retained by the guide rings I6, I1, refractory bricksor tiles 2| and 22 are laid upon the bottom I-beams I5 and surroundingthe tubes to build up the wall I I. The bricks 2|, 22 are laid in doublerows QX- tending transversely of the tube axes, witlr the -bricks ofadjacent rows disposed in staggered relationship relative to each other.Asis seen in Fig. 3, each of thev bricks 2| is cutaway at 23 cept that'they are not provided `with the cutaway corner portions of the latter.The end surfaces o'f the bricks 2I and-22 are corrugated', as shown at24 in Figs. 2 and 3, to provide vertically disposed, alternate recessesand ribs which interlock with the corrugated portions of the adjacentbricks. The Joints between the bricks extending transversely of therwall Il are consequently completgly leakproof, and since the bricks inadjacent rows are in staggered relationship, there are no verticallydisposed, straight line joints therebetween. Since the temperature atthe top or upper portion of this type of downdraft furnace is greaterthan that obtaining elsewhere therein, the top portion of the wall II ispreferably formed of a plurality of rows of vbricks 25, 26 which aresimilar to the bricks 2l, 22 in all respects with the exception thattheyare wider than the bricks 2|, 22 to provide a thicker wall section inthis higher temperature zone. 1

After all of the bricks 2l, 22, 25 and 25 have been laid, a suitablefluid plastic material 21 is poured into the annular recessessurrounding the several pipes I3, from the top of the wall. The plasticmaterial 21 will thus completely fill the annular pipe surroundingspaces formed by the cut-out portions 23 of the bricks to effectivelyinsulate the pipes I3. Consequently, the transfer of heat from therefractories 2|, 22, 25 and26 to thev pipes I3 will be materiallyreduced, and the black spots which would otherwise form on therefractories adjacent the `pipes will be entirely eliminated. Theplastic material 21 also eliminates vertical air seams in the wall I I,which, if present, would cause AtheA downward sucking of hot gasesthrough the pipes I3. This would re- -sult because the air or gasesaround the tubes would be cooler and would sink,`thus 'suckinghot gasesdownwardly from the top of the furnace. With the elimination of thisundesirable result by the plastic insulating material 21, the tubes I3will function to supply additional air for combustion at the top yof thefurnace units, since the ends of the tubes are left open and the zone ofhighest temperature is at the top ofthe furnace.

The tubes I3 are disposed in spaced relationshipl to each other as farapart as is consistent bricks 25, 26 and upper blocks 3| extendingdownwardly within such space and having side flange portions restingupon and supported by the refractories 28. The usual lower sloping walls32 normally employed in such furnace units may then be built up in themanner shown in Fig. 2 to rest at their upper ends against the lateralsurfaces of the dividing wall II.

It is thought that the invention and `many of its -attendant advantageswill be understood from the foregoing description, and it will beapparent that various changes maybe made in the form, construction andarrangement of the parts without departing from the spirit and scope ofthe invention or sacrificing all of its material advantages, the fornrhereinbefore described being merely a preferred embodiment thereoi.

I claim:

In a furnace, a partition comprising four parallel, horizontallyextending I beams having horizontally disposed flanges and forming upperand lower pairs vertically spaced from one another, the members formingsaid pairs being horizontally opposed and spaced from one another,a`plurality of parallel metal tubes extending vertically between saidpairs of I beams, each of said tubes having al pair of opposed notchesat the lower end thereof for seating on the top anges of the lower pairof I beams 'and a collar slidably engaged on the upper end portionthereof, each of said collars having an opposed pair of horizonvtallydisposed slots therein for sliding engage- `ment over the .adjacentlower flanges of said upper pair of I beams,l a wall formed ofv aplurality of blocks of ceramic material vertically supportedindependently of said-tubes by said lower pair of I beams, the blocksadjacent said tubes having arcuate openings therein of greater radiusthan the radius of said tubes whereby `to form a vertically disposedannular'channel between eachv of said tubes and the adjacent surfaces ofsaid blocks, and a filler of plastic insulatingmaterial filling saidchannels.

LOUIS H. HOSBEIN.

